<!DOCTYPE html>
<html>
<head>
    <style>
        div
        {
            border:  5px solid black;
            margin: 15px;
            width: 300px;
            height: 100px;
        }
        .absolute
        {
            position: absolute;
            top: 150px;
            left: 200px;
        }
    </style>
    <meta charset="UTF-8" />
    <title>绝对定位</title>
</head>
<body>
    <!-- absolute:脱离文档流不占原本位置 -->
    <div>1</div>
    <div class="absolute">div1</div>
    <div>1</div>
    <div>1</div>
    <div>1</div>
    <div>1</div>
    <div>1</div>
    <div>1</div>
    <div>1</div>
    <div>1</div>
</body>
</html>